Safety insertable auxiliary lever for air clamps



D. C. KLAUSMEYER. SAFETY INSERTABLE AUXILIARY LEVER FOR AIR CLAMPS.

I APPLICATION FILED APR. I3, I92I.

Patented Aug. 8, 1922.

2 SHEETSSHEET 1.

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Q 5% w v I K INVENTOR ATTORNEY D. C. KLAUSMEYER. SAFETY INSERTABLE AUXILIARY LEVER FOR AIR CLAMPS. APPLICATION FILED APR. I3, mm.

1 42 5, 3 8 ,8. Patented Aug- 8, 1922..

2 SHEETS-SHEET 2.

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WITNES C M A ggy/[ t ATTORNEY DAVID C. KLAUSMEYER, OF CINCINNATI, OHIO, ASSIGNOR- TO THE CINCINNATI BICY- FORD TOOL COMPANY, OF OAKLEY, CINCINNATI, OHIO, A. CORPORATION OF OHIO.

SAFETY INSERTABLIJ AUXILIARY LEVER FOR AIR- CLAMPS,

Application filed. April 13,

To all whom it may concern:

Be it known that I, DAVID C. KLAUs MEYER, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented new and Improved Safety Insertable Auxiliary Levers for Air Clamps, of which the following specification is a full disclosure.

This invention contemplates a safety clevice for the purpose of preventing accidents due to an abrupt power-actuation of a lever or other element that is intended, under certain conditions, to be operated only by the strength of the attendant.

In various species of machinery, it is customary to cause a given part or device, such for example as a clamp, to function; either by the very considerable force derived from a source of power (mechanical, electrical or pneumatic) or by the slight force permitted by limited strength of the user. The latter alternative is afforded either for the purpose of obtaining more delicate adjustments or to have it available as an emergency control in case the main source of power should fail. In such mechanisms, should the manual-control remain effective simultaneously with the power control, and if the power should. then be thrown in, the power would naturally produce a movement of themanual-element with such force or speed as to endanger anyone within its path. Consequently, it has been customary to arrange the manual-member so that it may be disconnected at the will of the user, But it not infrequently happens that the user forgets to effect the disconnection.

Now this invention, in its broader aspects, accordingly proposes an inter-connection between the two controls of such a nature that whenever resort is made to the power-control, the manual-control will automatically be rendered inert, and conversely, so that an attempt to operate the manual-control will not result in a kick or an opposition from the main power and also so that the number of parts required to be operated againstfrictional resistance by the manual-control may be reduced to a minimum.

Machine-tools of various types may to advantage be provided with this invention for Specification of Letters Patent.

Patented Aug. 8, 1922.

1921. Serial No. 461,145.

the purpose of securing better control of the chief supporting-elements forming movable and adjustable parts of the general frame organization. When a manuallyoperated member is employed to adjust or fix the position of such an element, it is generally necessary so to form said member that its hand-grasp will have a very considerable extent of movement so as to obtain the leverage or multiplying effect requisite to the control of so ponderous an element. By resorting to this invention, no danger can arise through a spinning or whipping of the hand-grasp when the power is substituted for the manual operation even though the user should make no effort towards first disconnecting the manual-control. Consequently the manipulation of the clamp for vfixing the location of the adjustable frame element may be eifected either by power or, in an emergency, by hand without any untoward mishaps.

In the case of radial-drills, thisinvention possesses notable utilities and distinctive advantages in that the clamp for locking the ponderous sleeve (and associated radial- .rm and drill-head) against rotation about he post or column may not only be gripped by suflicient power to secure abso lute rigidity, but this may be done with slight effort on the part of the user and, what is very important, without being obliged to change the position adopted by him as affording the best view of the drillpoint, and without having his close observation of the adjustment of the drill-point distracted by the necessity of making sure that no one is in the path of the manuallever at the instant he is ready to apply the clamping power; all of which, however, is accomplished in such a manner as always to have available a hand-lever that may be resorted to in an emergency, or if desired.

Other objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in connection with the annexed drawings.

To enable others skilled in the art to so fully apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as power-lever I fluid medium, as compressed a1r,and a fluid rnotor), theoperation of the power-lever a part of this disclosure, and in such drawings like characters of reference denote corresponding parts throughout all the views, of which j Fig. 1. is a side elevation of a radial drill showing the locking elements and their as sociated control elements, partly in section. Fig. 2 is a section on the line 22 of Fig.

1. Fig. 3 is an enlarged detail view of some of the elements of the invention, a portion being shown in elevation. Fig. 4; is an end elevation, partly in section of one of the elements shown in Fig. 1, the manual control lever being wholly inserted in its socket and the safety mechanism being operated to throw the remote control lever out of effective operation. Fig. 5 is a similar view showing the manual control lever partially withdrawn and the safety mechanism operated to throw the remote control lever into operation, and Fig. 6 is a fragmentary section along the line 66 of Fig. 4-. i

For the purpose of illustrating my in vention I have applied the same to a drill of the type commonlyknown'as a radiaL I drill, although it is to be understood, that inlthe broad aspects of my invention, it can be applied to a machine of any characterembodyinga plurality of controls, one of which is manually actuated In the type of drill hcreinabove referred to, the radial-arm for the drill-head is adjustable both vertically and rotatively on a supporting-column, or sleeve and means are prov ded to lock the column or sleeve in adjusted position. The locking-means for fixing the angular position of the arm may adjacent the drill-head would cause an operation of the manual lever adjacent the clamp; thereby perhaps injuring anyone within the path of movement of the same. Through my invention, the operation of the lever adjacent the drill-head (which i lever I term the remote control lever) does not actuate the other control lever adjacent the lockingmeans.

Now referring to the drawings more in detail, A indicates a rotatable sleeve on which is Vertically IIlOVEllJlGrELD arm 13 supporting a laterally movable drillhead B. The sleeve is enlarged at its lower end to form a bell G which latter is split as at C to form two ears 1). Through the cars is inserted a draw-bolt E having an eye adapted to receive a cam F formed eccentrically on. a stub-shaft G journaled in lugs H and I cast integral with the bell-end. The bellend fits over a suitable stationary post M, to which it may be clamped. To rotate the shaft G (and thereby clamp the post to the base) the upper end of the shaft G has riveted or otherwise secured thereto a clutchcollar J having a cylindrical split-socket J, formed on one side thereof, in which there fits the cylindrical end K of a lever K. Each of the split-ends of the socket is provided with an ear L; and the ears may be drawn together by means of a tap-bolt L when the hand-lever has been fully inserted within the socket.

The upper portion of the clutch-collar has a plurality of upstanding clutch-teeth J adapted to cooperate with similarly downwardl extending teeth 0 on a clutchcollar 0 slidably splined on a shaft N; which latter may be rotated, as for example, bya fluid motor S under control of an operating-lever Z adjacent the drill-head but generally remote from the lever K by reason of the usualposition given the drillhead. In a common form of construction, the power control-lever Z is positioned between two lugs Z and is splined on a shaft X which controls the admission of air to the motor S; whereby the power controllever Z may be moved automatically with the drill head to ensure that this lever is always within reach of the operator, al-

though it may he solocated by hand if desired. In the normal operation of the looking meclmnism, it is only the remote or power control-lever that is habitually utilized and the near or manual controllever'is not in use but is available in case the power should fail. If, however, the fluid-motor or other portion of the power control apparatus should become disabled,

it is then easy to utilize the near or purely tical. bore in which is slidable a pin T adapted to engage on the underside of one of the teethO' of the clutch-collar 0. Normally,

the teeth of the clutch-collars are in engagement to permit an actuation of the lever Z (through the intermediary of the motor S,

the shaft N and the clutch collars) to effect a rotation of the stub-shaft G. When the handle K is inserted within thebore J, a bevelled-end K" engages the pin T to disengage the clutch; thereby rendering the power control-lever ineffective. If now, through neglect, the manual-lever be left in its socket, an actuation of the power-controllever would have no elfect thereupon. When the near lever K is withdrawn the clutchteeth may become re-engaged and the power control-lever may then again be made effective. he bevel K on the lever may so cut, as indicated by dotted lines, that the lever cannotbe left in a half-withdrawn position, as will be apparent from an inspection of Figure 5.

The upward movement of the clutch-element is limited by a collar R riveted or otherwise secured to the shaft N, while if desired, the clutch may be held permanently disengaged by means of a set-screw Q, tapped into the clutch-collar 0.

It will be seen that, by virtue of the safety arrangement herein disclosed, whenever the hand-lever K is thrown in, the clamp may be operated only by manual force and that, while the lever Z (which controls the power) may still be moved to turn on or turn off the power, the power-driven shaft N will nevertheless be incapable of operating the clamp. Conversely, whenever the mechanism is so conditioned that the power-control lever Z when actuated may result in a poweractuation of the clamp, then the means for manually actuating the clamp is rendered inoperative.

Without further analysis the foregoing will so fully reveal the gist of this invention that others can, by applying current knowledge, readily adapt it for various utilizations without omitting certain features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention, and therefore such adaptations should be and are intended to be comprehended within the meaning and range of equivalency of the following claims.

Having thus revealed this invention, 1 claim as new and desire to secure the following combinations and elements, or equivalents thereof, by Letters Patent of the United States:

1. A safety-mechanism combining two relatively movable elements; a device for locking said elements together; a source of power; a member adapted to be moved by said power; a lever for turning-on and turning-off said power to control the power actuation of said member; a connection between said member and said device; and a second lever adapted to be positioned to enable it to actuate said device by manual force applied to said second lever, the parts being so constructed that said connection will be severed when said second lever is in its operative position.

2. A safety-mechanism combining two relatively movable elements; a device for locking said elements together; a source of power member adapted to be moved by said power; a lever for turning-on and turning-off said power to control the power actuation of said member; a hand-lever adapted to be positioned to enable said device to be manually operated; and a connection controlled. by said hand-lever for enabling said poweractuated member to operate said device only when said hand-lever is in a position ineffective to operate said device.

3. A drilling machine combining a col umn; an arm slidably attached at one end to said column; a clamping device for looking said arm and said column against relative movement in a horizontal plane; a power-driven member; a lever attached to be used to connect or disconnect said member from said device; and a lever mounted on said and adapted to control the power for actuating said member.

l. A drilling machine combining a column; an arm adjustably mounted thereon; means for locking said'arm against movement relative to said column in a horizontal plane; a power-driven member normally connected witl said means for operating the same by power; a power-controlling lever for regulating the actuation by power of said member; and an auxiliary lever attached, when operatively connected with said means, to effect a disconnection between said means and said member, said last mentioned lever being adapted to enable said means to be actuated manually.

drilling machine combining a member adapted to be actuated; a power-driven element; a lever for controlling the actuation of said element by the power; and a second lever adapted to be used for manually operating said member and adapted to be entirely withdrawn from said mechanism; and a safety clutch intervening between said member and said element and adapted to establish anoperative relation therebetween only when said last mentioned lever has been withdrawn from said mechanism.

6. A safety-mechanism combining a firstmember; a second-member; means for effecting a movement of one member relatively to the other; a source of power; connections therefrom to said means for enabling the latter to be actuated by power; a normally ineffective manually-operable agent; and a device adapted to be automatically operated by said agent for enabling said power-actuated means to be moved ineffectively when said agent is in effective operating position.

7. A machine tool combining a stationary-member; a movable-member adapted to be clamped thereto; a clamping-mechanism for said members; a manual control for manually operating the clamping-mechanism; a power-actuating means for said clamping-mechanism; means operative upon the insertion of the manual control for rendering the power-actuating means effective; and means for again rendering the poweractuating means effective upon a with drawal of the manual control;

8. A machlne tool comblnlng a stat1onary-member; a movable-member; means for-clamping said members together comprising two controls; a clutch comprising normally inter-engaging elements interposed between the controls, one of the ele ments of the clutch being provided with a socket; and means operative upon the insertion of one of the controls within the socket to disengage the clutch-elements. v

9. A machine tool comprising a stationary-member; amovable-member; means for clamping the two together comprising a rotatable shaft; a clutch-element secured to said shaft; a manual-lever insertable in a socket in one of said clutch'elements; a cooperating cluteh-element normally in engagement with said first clutch-element; a control-mechanism for said cooperating clutch-element; a bore in the first clutchelement; a pin within said bore; and means operative upon the insertion of the manuallever within the socket to raise the pin in order to disengage the clutch-elements 10. A machine tool combining'a stationary-member; a movable-member; means for clamping the two together comprising a rotatable-shaft; a clutch-element secured to said shaft; a manual-lever having a bevelled-end insertable in a socket in said clutch-element; a cooperating clnt ::h-element normally in engagement with said first clutch-element; Y power-control-mechanism for said cooperating clutch-element; a

bore in the first clutch-element; and a pin within said bore, the bevelled-end of the lever operating to raise the pin to disengage the clutch-elements upon its insertion with in the socket.

11. A radial-drill combining a rotarycolumn; a drill-carryin arm arranged on said column; means for clamping said column to prevent it from rotating; a manual control-mechanism to actuate said clamping-means; power control-mechanism for actuating said clamping mechanism; and means cooperating with the manual control-mechanism to disengage the other of said mechanlsms from the clampingmechanism when the same is conditioned for operation. 7 a i 12. A radial-drill combining a vertical supporting column; a stationary post; a

power control-means for locking said supporting-columns to said stationary post; a manual control comprising an operatinghandle for locking said supporting-column to its stationary post; and means to prevent the power control'means from actuating the manual control when the latter is in operating position.

13. A radial-drill comprising a stationary-base; a rotatable supporting column; a lateral-arm supporting a laterally-movable drill-head; means forclamping said supporting-column to the stationary base, comprising a shaft; a clutch-element secured to said shaft; a socket provided by said clutch-element; a second shaft; a second clutch-element on said shaft normally engaged with said first-element; means including a control element mounted adjacent the drill head and movable therewith, for rotating said second shaft and through the clutch the first shaft; other means for moving said first shaft comprising a lever insertable within the socket; and means in said socket to disengage the clutch elements upon an insertion of the lever within the socket. p

1 A radial-drill combining a liorizontally-ezitending arm; a structure adjustably carrying one end of said arm; a drill-head horizontally-slidable on said arm; a clamp for locking said structure against adjustment; a manualielement for binding said clamp; power-actuated means for binding said cl amp a manual control for said poweractuated means maintainable adjacent said drill-head to be immediately accessible to an attendant when adjusting the drill to the work; and an inter-connection between said element and said manual control automatically preventing both from being simultaneously operative.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

DAVID C. KLAUSMEYER. 

